High-performance epoxy hybrid nanocomposites containing organophilic layered silicates and compatibilized liquid rubber

J. Fröhlich, R. Thomann, O. Gryshchuk, J. Karger-Kocsis, R. Mülhaupt

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A mixture of two epoxy resins, tetraglycidyl 4,4′-diaminodiphenyl methane and bisphenol-A diglycidylether, cured with 4,4′-diaminodiphenyl sulfone, was used as matrix material for high-performance epoxy hybrid nanocomposites containing organophilicly modified synthetic fluorohectorite and compatibilized liquid six-arm star poly(propylene oxide-block-ethylene oxide) (abbreviated as PPO). The hydroxy end groups of the poly(propylene oxide-block-ethylene oxide) were modified, yielding a six-arm star PPO with an average of two pendant stearate chains, two phenol groups, and two hydroxy end groups. The alkyl chains of the stearate end groups played an important role in tailoring the polarity of the polymer. Its phenol end groups ensured covalent bonding between liquid polymer and epoxy resin. Two different organophilic fluorohectorites were used in combination with the functionalized PPO. The morphology of the materials was examined by transmission electron microscopy. The hybrid nanocomposites were composed of intercalated clay particles as well as separated PPO spheres in the epoxy matrix. As determined by dynamic mechanical analysis, the prepared composites possessed glass-transition temperatures around 220°C. Although the tensile moduli remain unaltered, the tensile strengths of the hybrid materials were significantly improved. The relatively high fracture toughness of the neat resin, though, was not preserved for the hybrid resins. Scanning electron microscopy of the fracture surfaces revealed extensive matrix shear yielding for the neat resin, whereas the predominant fracture mode of the hybrid nanocomposites was crack bifurcation and branching.

Original languageEnglish
Pages (from-to)3088-3096
Number of pages9
JournalJournal of Applied Polymer Science
Volume92
Issue number5
DOIs
Publication statusPublished - Jun 5 2004

Fingerprint

Silicates
Polyphenylene oxides
Rubber
Nanocomposites
Epoxy Resins
Polypropylene oxides
Stearates
Ethylene Oxide
Resins
Liquids
Phenol
Epoxy resins
Phenols
Stars
Polymers
Ethylene
Sulfones
Oxides
Hybrid materials
Methane

Keywords

  • Compatibilization
  • Liquid rubber
  • Nanocomposites
  • Organoclay
  • Thermosets

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

High-performance epoxy hybrid nanocomposites containing organophilic layered silicates and compatibilized liquid rubber. / Fröhlich, J.; Thomann, R.; Gryshchuk, O.; Karger-Kocsis, J.; Mülhaupt, R.

In: Journal of Applied Polymer Science, Vol. 92, No. 5, 05.06.2004, p. 3088-3096.

Research output: Contribution to journalArticle

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